Measurement of the CKM angle γ using the B± → D∗h ± channels
A measurement of the CP-violating observables from B± → D∗K± and B± → D∗π ± decays is presented, where D∗ (D) is an admixture of D∗0 and D¯ ∗0 (D0 and D¯ 0 ) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0 Sπ +π −/K0 SK+K−. The measurement is performed by analysing the sig...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dnet:dau_________::1b712e7b82b8691e3bb8b98900831c4f |
| Acceso en línea: | https://hdl.handle.net/20.500.14342/6464 https://doi.org/10.1007/JHEP12(2023)013 |
| Access Level: | acceso abierto |
| Palabra clave: | B Physics CKM Angle Gamma CP Violation Hadron-Hadron Scattering Angular momentum of light Circular Dichroism Spectroscopy Experimental Nuclear Physics Nuclear and Particle Physics Nuclear Physics Particle Physics Gran col·lisionador d'hadrons 51 53 539 |
| Sumario: | A measurement of the CP-violating observables from B± → D∗K± and B± → D∗π ± decays is presented, where D∗ (D) is an admixture of D∗0 and D¯ ∗0 (D0 and D¯ 0 ) states and is reconstructed through the decay chains D∗ → Dπ0/γ and D → K0 Sπ +π −/K0 SK+K−. The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. The data sample used was collected by the LHCb experiment in proton-proton collisions and corresponds to a total integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKM angle γ is determined to be (69+13 −14) ◦ using the measured CP-violating observables. The hadronic parameters r D∗K± B , rD∗π± B , δD∗K± B , δD∗π± B , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported. |
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